Vibrating converter



Aug. 18, 1931. w, Q R 1,819,617

VIBRA'TZNQCONYERTER Filed Sept. 12, 1925 220 was INVENTOR ILHELM MQSER j; a ic 4 A ORNEY 3o or supply direct current by means of a pe- Patented Aug. 18, 1931 v UNITED STATES PATENT OFFICE 'WI HEL JuosEa, or BERLIN, GERMANY, ASSIGNOR To GESELLSCHAFT Fun DRAHT- LOSE TELEGRAPHIE M. B. 111., OF BERLIN, GERMANY, A CORPORATION OF- GERMANY VIBRATI'NG CONVERTER iApplication filed September 12, 1925, Serial No. 55,920, and in Germany October 4, 1.924.

The object of my invention is to produce a simple and cheap converter for converting high potential direct current into low potential direct current.

Another object of my invention is to accomplish this desired result by. means of a converter of the vibrating armature type.

Still another object of my invention is to accomplish this result by means using the induced alternating current induced in the electromagnet of the vibrating converter.

Further objects of the invention will appear from the following detailed specification when read in connection with the drawing, the single figure of which schematically represents an embodiment of my invention.

It is very desirable to have a simple and cheaply constructed converter useful in reducing the line voltage to low direct current potentials for the purpose of charging of small batteries, for instance, of the type useful in the operation of radio apparatus or electric-bell systems.

My invention discloses an arrangement adapted to economically convert direct current of relatively high voltage into direct current of low voltage by utilizing the principle of a vibrating rectifier.

The essential idea underlying my invention consists in, so to speak, chopping up the line riodically vibrating armature adapted to actuate 1, contact. The incidentally resulting alternating current component is trans formed and rectified by a contact operated by the same armature, or another synchronously running armature.

Referring to the drawing a is a plug for tapping the supply line from-which the line current flows by way of a rimary winding 6 of an electromagnet c and thence in known manner by way of a contact d of armature e backto the line. The arrangement described is the well-known connection of a so-called Neef hammer. An. adjustable spring device shown generally as h attached to the armature e' or keeper determines the natural frequency of the armature and consequently the rhythm at which contacting takes place.

In the primary winding of the keeper there further flows an alternatingv current com ponent the number of cycles of which is equal to the period of contacting. The voltage of the alternating current component is about half the direct current voltage. The alternating current component induces in the secondary winding g wrapped on the magnet core 0 alternating current of another voltage, say, of lower voltage. This alternating current changed in potential is conducted by way of contact 1, which is likewise attached to the keeper 6, the opening of the said contact occurring, of course, in synchronism with the alternating current so that, for instance, the negative component is suppressed, while the positive half is allowed to pass. It would also be possible 'to have recourse to known arrangements and to a plurality of contacts, in

order to utilize both the positive and negative impulses.

Having described my invention, what I claim is 1. A converter for changing the voltage of direct current comprising an electro magnet having an exciting coil connected to the input circuit, a second coil on said electro magnet connected in the output circuit, said electro magnet controlling a vibrating armature provided with two contacts one of said contacts being connected in the input. circuit and the other contact being connected in the output circuit whereby the currents in the input and output circuits are synchronously interrupted.

. 2. A converter for changing the voltage of direct current comprising an. output and an input circuit, an electro magnethaving an excircuit, and an auxiliary circuit coupledto said input circuit, at vibrating armature adapted to make and break said input circuit, means controlled thereby for periodically energizing said clectromagnet and inducing alternating currents in said auxiliary circuit and means comprising said vibrating armature for producing in said output circuit a pulsating direct current therefrom, one side of said direct current input circuit being common to both input and output circuits, said auxiliary circuit forming the other side of said output circuit.

DR. WILHE M MOSER. 

